Fix screenshots urls

subjects/bring-it-to-life/README.md

@@ -22,7 +22,7 @@ Reload the page - it's alive! Your JS brain has control and orders your HTML/CSS
 ### Expected output
 
 This is what you should see in the browser:
-![](bring-it-to-life.png)
+![](https://github.com/01-edu/public/raw/master/subjects/bring-it-to-life/bring-it-to-life.png)
 
 ### Notions
 

subjects/class-that/README.md

@@ -23,7 +23,7 @@ Note that you can attribute several classes to a same element ; create the class
 ### Expected output
 
 This is what you should see in the browser:
-![](class-that.png)
+![](https://github.com/01-edu/public/raw/master/subjects/class-that/class-that.png)
 
 ### Notions
 

subjects/nesting-organs/README.md

@@ -55,7 +55,7 @@ p {
 ### Expected output
 
 This is what you should see in the browser:
-![](nesting-organs.png)
+![](https://github.com/01-edu/public/raw/master/subjects/nesting-organs/nesting-organs.png)
 
 ### Notions